Friday, March 22, 2013

There are many
commands available to get network statistics and particular port details. In
this article, we are not going in deep to understand these commands but we will
just understand the overall functionality of these command.

Nmap Command

Nmap is, especially
network exploration tool but it can be used as a security or port scanner. We
can scan entire network or selected machine or single server by nmap command.
It is also useful for scanning firewall rules.

Nmap is
designed to allow system administrators:

·
To scan large networks to determine which servers or hosts are running and what
services they are offering.

A netstat is a
command line tool which provides information about incoming and outgoing
network connections, routing tables, network protocol statistics and network
interface. Following are some of the features of netstat command.

Features of
netstat command:

Displays routing information
maintained by Kernel. (netstat –r)

Display multicast group membership information.(netstat –g)

It is displays information related to all network statistics/interfaces.
(netstat –s/netstat –i)

It can monitor system continuously by netstat –tc command. (c – Option most
important.)

Unicornscan is
a new information gathering and correlation engine built for and by members of
the security research and testing communities. It was designed to provide an
engine that is Scalable, Accurate, Flexible, and Efficient. It is released for
the community to use under the terms of the GPL license.

Get more
information related to this tool by clicking here: unicornscan

Zenmap is the Nmap Security Scanner GUI. It is available
in multi-platform for Linux, Windows,
Mac OS X, BSD, etc. It is free and open source application and it is designed
to make Nmap easy for beginners to use while providing advanced features for
experienced Nmap users. Frequently used scans can be saved as profiles to make
them easy to run repeatedly. A command creator allows interactive creation of nmap
command lines. Scan results can be saved and viewed later. Saved scan results
can be compared with one another to see how they differ. The results of recent
scans are stored in a searchable database.

Nast – Network Analyzer Sniffer Tool

Nast is a packet sniffer and a LAN analyzer based
on Libnet and Libpcap. It can sniff in normal mode or in promiscuous mode the
packets on a network interface and log it. It dumps the headers of packets
and the payload in ascii or ascii-hex format.
You can apply a filter. The sniffed data can be saved in a parated file.

Knocker is a
simple and easy to use TCP security port
scanner written in C to analyze hosts and all of the different services
started on them. It is available for Linux, FreeBSD, HP-UX, and
Windows9x/2000/NT and it is licensed under the GNU General Public License GPL.